I previously had a 4x2 GB mix of 4 GB of this Mushkin & the 4 GB G.Skill DDR2-800 5-5-5 PQ kit.
The G.Skill didn't clock nearly as well though, so it got relegated to use in my HTPC & i bought a second kit of the Mushkin.

My P5B Deluxe finally got retired into use in my HTPC as well; it had a good run, but it was showing its age & wasn't quite doing what i wanted it to.

So now i have a DFI UT P35-T2R + Q6700 + 4x2 GB Mushkin in the main rig.
Still learning the ropes on this DFI, so results could be better, voltages lower, & timings tighter, etc.
But for now i'm just getting the hang of tweaking things with it.

I will say this DFI is far better already for working with OCing, though it requires a lot more fine tuning.

Overnight i ran:
8 GB DDR2-1050 5-5-5-15 (7 hours P95 custom)

Now i tightened up perf. level to reasonable levels & am trying for something i can run for 24/7 use i hope.
TRFC is deliberately very loose; will work on that later.

8 GB DDR2-1080 5-5-5-15 in testing

NB & PWM get absolutely scorching, as can be seen in the first screenie, so i'm using the house fan to help a little for now :p, & will likely pick up the side panel for my case that has the 250mm fan on it; hopefully will help a bit.

So far i can't seem to use the 1333 MHz strap with this RAM; it seems to prefer the 1066 MHz strap, as it won't even boot at the speeds i can do with the 1066 MHz one, which seems kinda backwards to me.

Very nice! Yah get a fan over pwn and chipset, that is pretty hot. I just use a 120mm over that area and temps are around 40ish (I also use quad and 8GB). You can probably run lower volts thru NB as well.

__________________Donkeys kill more people annually than plane crashes or shark attacks.

Alas, one instance of P95 conked out at 50 minutes, so i'm back to the drawing board.

Dropped down to 9x multi to take the CPU out of the equation, & loosened up more of the subtimings around +2 each to see if that does anything.
Then if that works, it's the fun process of tightening each one up till i figure out which one was too tight...

These DDR2-800 kits i have are equally as good as the DDR2-1000 Redlines.
I consider both the Redlines @ 500 MHz & these XP2s @ 400 MHz to be pretty much the exact same thing, since either kit can run DDR2-800 4-4-4 or DDR2-1000 5-5-5 (or higher, usually to at least DDR2-1100)
In my case, i don't think DDR2-1100 will happen, since running 4x2 GB is insanely hard on the NB & everything in general, but if i ripped out one of the kits & ran 2x2 GB, i'd be hitting much higher.
I might try clocking one 2x2 GB later to see how they do, but it's somewhat pointless for me since i want to run 8 GB anyway.
Based on clocking one kit on the P5B-D, i suspect i could hit DDR2-1120+ with just 2x2 GB on this better motherboard (or higher if i just wanted unstable screenshots...).

Nothing wrong with that G.Skill either, though i personally prefer the Mushkin brand due to support & what i'd like to think is better QC testing.

As for cooling the NB, yeah, before putting in this DFI, i actually had fans twist tied to the side of my case hanging down blowing air over the NB/RAM

Was pretty ghetto-tastic actually.
But i'd like to close this case eventually, so that won't do, & i don't feel like rigging that up again.